Study of Zr52.5Cu17.9Ni14.6Al10Ti5 Bulk Amorphous Alloys
-
摘要: 利用射流成型法制备出Zr52.5Cu17.9Ni14.6Al10Ti5大块非晶.该合金系统具有很强的玻璃形成能力和宽的过冷区,其玻璃转化温度Tg=650.63K,晶化温度Tx=721.90K,过冷区△Tx=Tx-Tg=71.27K.Vicker硬度为558kg/mm2压缩断裂强度1730GPa,弹性模量82GPa.观察其断口有大量纹络状河流花样,并有融化的液滴存在.该合金系统大的玻璃形成能力应归功于合金组元的多样性、组元间大的原子半径比率、组元间大的混合负热及在冷却过程中过冷区粘度的急剧上升等因素.Abstract: Zr52.5 Cu17.9Ni14.6Al10Ti5 bulk amorphous alloy was prepared by a water-cooled copper mold. The alloy system has an excellent glass formation ability (GFA) and a wide supercooled liquid region. The glass transition temperature (Tg), the crystallizaion temperature (Tx), the fracture stress, the plastic,Vickers hardness and elastic modulus for the bulk amorphous alloys with a diameter of 3 mm are 377.63℃,448.9℃,1 730 MPa, 0.5%, 558 and 82 GPa, respectively The bulk amorphous alloys have good mechanical properties. The excellen glass formation ability of Zr52.5Cu17.9Ni14.6Al10Ti5 alloys is presumably due to a combination of significatly differen atomic size ratios above about 12%, multicomponent alloy system consisting of more than three elements and optimum negative heats of mixing among the constituent elements.
-
计量
- 文章访问数: 243
- HTML全文浏览量: 80
- PDF下载量: 16
下载:
